Zoology-(general)
NEET Zoology (general) MCQ Question
Type: MCQ-diagram based-Hard-Class 11
A diagram shows a cross-section of the diffusion membrane involved in gas exchange in the lungs. Identify the layer responsible for the initial contact with alveolar air.
A
Thin squamous epithelium of alveoli
B
Basement membrane supporting the epithelium
C
Endothelium of alveolar capillaries
D
Basement membrane surrounding endothelial cells
Correct Answer
Option A
Detailed Explanation
The thin squamous epithelium of alveoli is the outermost layer of the diffusion membrane, directly in contact with alveolar air, facilitating gas exchange.
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